Practice Problem: Energy Diagrams

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Physics, Science
•
11th Grade - University
•
Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary purpose of an energy diagram in the context of chemical reactions?
To determine the color change in a reaction
To calculate the speed of a reaction
To illustrate the potential energy changes throughout a reaction
To measure the temperature change during a reaction
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In an exothermic reaction, how should the energy levels of products and reactants be positioned on an energy diagram?
Products should be at the midpoint between reactants and the transition state
Products should be lower than reactants
Products should be higher than reactants
Products and reactants should be at the same level
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the term 'activation energy' refer to in a chemical reaction?
The energy required to start a reaction
The energy absorbed by the products
The energy released during a reaction
The energy needed to maintain a reaction
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the first step considered the rate-determining step in a two-step reaction?
It is the fastest step in the reaction
It involves the most complex molecules
It has the largest activation energy
It has the highest concentration of reactants
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What effect does a larger activation energy have on the rate of a reaction?
It speeds up the reaction
It has no effect on the reaction rate
It slows down the reaction
It causes the reaction to stop
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